What is the meaning of Cochlea?

The complex, spirally coiled, tapered cavity of the inner ear of higher vertebrates, which contains the organ of Corti and in which sound vibrations are converted into nerve impulses.

A spiral-shaped shell, especially that of a snail.

snail

snailshell

1. spiral (form of a snailshell)
2. screw of a press
3. Archimedes' screw, water screw, screw pump (machine for drawing water by raising it)
4. A kind of revolving door.

spiral (form of a snailshell)

screw of a press

Archimedes' screw, water screw, screw pump (machine for drawing water by raising it)

A kind of revolving door.

cochlea

Source: wiktionary.org